Payback period of solar collectors. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Payback period of solar collectors. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Alternative energy sources

Comments on the article

Determining the cost-effectiveness of using solar collectors is simple.

To do this, you first need to determine the amount of heat that the solar collector will provide for the year (production), for which the amount of solar radiation on the earth's surface in this place is multiplied by the average efficiency of the solar collector.

For example, for Kyiv: The amount of solar radiation is 1000 kWh/m2/year, multiplied by the efficiency of the most efficient solar collector-heater 55%, we get heat generation by the solar collector 550 kWh/m2/year. That is, one square meter of a good solar collector will produce 550 kilowatts of heat per year.

Taking into account seasonal changes in solar radiation: 14% or 77 kW of heat will be produced in winter, 29% or 160 kW in spring, 36% or 198 kW in summer, 116 kW in autumn. In December and January, heat generation is minimal and will amount to 3,3% of the total heat production per month, or 18 kW per month. That is why solar collectors are rarely used for heating.

To determine the economic efficiency, the received 550 kW of heat must be compared with another, alternative heat source. For example, 550 kW of heat can be obtained from electricity, which requires 550 kWh of electricity. The tariff for the population for electricity in 2009 in Ukraine was 0,18...0,23 hryvnia/kWh or 0,016...0,02 euro/kWh. Therefore, for the production of 550 kW of heat, you need to spend 550x0,016 ... 0,02 = 8,8 ... 11 euros per year. From here it is possible to determine the payback period of a thermal solar collector in comparison with another, alternative form of energy. The service life of a thermal solar collector is usually up to 10 years.

Similarly, the economic efficiency of the production of electrical energy by photovoltaic cells can be calculated. In this case, one should take into account the efficiency of photovoltaic cells - up to 7%, the service life of the cells is 10-20 years.

See other articles Section Alternative energy sources.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Major risk factor for gambling addiction 07.05.2024

Computer games are becoming an increasingly popular form of entertainment among teenagers, but the associated risk of gaming addiction remains a significant problem. American scientists conducted a study to determine the main factors contributing to this addiction and offer recommendations for its prevention. Over the course of six years, 385 teenagers were followed to find out what factors may predispose them to gambling addiction. The results showed that 90% of study participants were not at risk of addiction, while 10% became gambling addicts. It turned out that the key factor in the onset of gambling addiction is a low level of prosocial behavior. Teenagers with a low level of prosocial behavior do not show interest in the help and support of others, which can lead to a loss of contact with the real world and a deepening dependence on virtual reality offered by computer games. Based on these results, scientists ... >>

Traffic noise delays the growth of chicks 06.05.2024

The sounds that surround us in modern cities are becoming increasingly piercing. However, few people think about how this noise affects the animal world, especially such delicate creatures as chicks that have not yet hatched from their eggs. Recent research is shedding light on this issue, indicating serious consequences for their development and survival. Scientists have found that exposure of zebra diamondback chicks to traffic noise can cause serious disruption to their development. Experiments have shown that noise pollution can significantly delay their hatching, and those chicks that do emerge face a number of health-promoting problems. The researchers also found that the negative effects of noise pollution extend into the adult birds. Reduced chances of reproduction and decreased fertility indicate the long-term effects that traffic noise has on wildlife. The study results highlight the need ... >>

Random news from the Archive

The chamber is smaller than the thickness of a human hair 12.08.2021

The University of Glasgow has created a fiber optic cable as thin as a human hair that can transmit accurate XNUMXD images in real time, thus creating a tiny flexible camera.

The system developed by British scientists is several orders of magnitude smaller than the existing cameras used on fiber optic cable. The device uses a cable 40 centimeters long and 50 micrometers in diameter (the thickness of a human hair ranges from 80 to 110 microns). It can take 3D images of objects up to 2,5 meters away.

The new technique is based on the technology of extended microscopy, which is based on the method of suppression of spontaneous emission (STED), which allows achieving nanoscale resolution by overcoming the diffraction limit of optical microscopes. The development of this technique brought the author of the invention, Stefan Hell, the Nobel Prize in Chemistry in 2014.

Other interesting news:

▪ rare earth piglets

▪ Fast blood test

▪ Vulnerability of Empires

▪ Wearable biosensors from old CDs

▪ Intel sold 1.000.000.000 processors in 25 years

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Power regulators, thermometers, heat stabilizers. Article selection

▪ article Power has changed! Popular expression

▪ article How are pearls formed? Detailed answer

▪ UK National Grid article. Tourist tips

▪ article Device for automatic rotation of the antenna. Encyclopedia of radio electronics and electrical engineering

▪ article Motorola V60, V66 pinout. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews